One summer afternoon, after giving a presentation in the House of Commons, Dr Yvonne Carmichael (Emily Watson), a scientist at the Beaufort institute, meets a mysterious man (Ben Chaplin), who begins to charm her by offering her a tour of the Secret Chapel of the Commons. During the tour,Apple Tree Yard Season 2 DVD the pair take an instant liking to one another, and end up having sex together in a broom cupboard. Unaware that she will ever encounter her mystery lover again, and with her failing marriage to Gary (Mark Bonnar) barely hanging on by a thread, Yvonne begins to compose secret letters which play out a fantasy relationship involving Mr X. The next day Yvonne retraces her steps,Apple Tree Yard Season 2 with the hope of bumping into Mr. X once more. Sitting in a cafe opposite the Commons, she notices Mr. X and invites him for coffee. Having both been thrilled by their previous encounter, the pair end up having sex in the cafe toilets. After sex, they exchange telephone numbers and agree to begin an illicit affair fuelled by the thrill of having sex in a public place.